Engraving-machine.



No. 7||,273. Patented Oct. l4, I902.

' 'P v. AVRIL.

ENGBAVING MACHINE.

[Application filed Sept. 3, 1901. (No Modal.)

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No. 7||,27s. Patented w. l4, I902.

P. v. AVRIL.

ENGRAVING MACHINE 1 (Application filed Sept. 8, 1 901 (mi Nodal.) 1 l0Shaets-'Sheot 2.

wa'zezsas Jaye/Z542 M/W FauZ Vcflz'raZ EAL/MAW) R Patented Oct. 14,1902.

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ENGRAVING MACHINE.

' (Application filed Sept. '3, 19013 l0 Sheets-Sheet 3.

(No Model.)

m m "J No. 7|| ,273. Patented o I P. v. AVRIL.

ENGBAVING MACHINE.

(Application filed Sept. 8, 1901.) (No Model.)

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P. V. AVRIL.

ENGRAVING MACHINE.

(Application filed Sept. 3, 1901.)

( No Model.) l0 Sheets-Sheet 5.

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No. 7n,27s. Patentd Oct. I4, I902.

P. v. AVRIL.

ENGRAVING MACHINE.

(Application filed Sept. 8, 1901.) (No Model.) I0 Shoeiv-Shaat B.

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(Application filed Sept. 3, 1961. (No Iludel.) l0 Sheets-Shoot 7.

No. 7n,273.- I I Patented Oct. l4, I902.

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No. 71!,273. Patented Dot. I4, I902.

P. v. AVRIL.

ENGRAVING MACHINE.

(Application filed Sept, 8, 1901.)

l0 Sheets-Sheet 8.

(Io Modal.)

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No. 7|l,273. Patented Oct. l4. I902.

P. V. AVRIL. ENGBAVING MACHINE.

(Application filed Sept. 8, 1901.)

(No Model.) 10 Sheets-Shaat 9.

'ru uonms PETERS co. PHOTQLATNQ. WASHINGTON. o. c.

N0. 7H,273. Patentedflct. I4, I902.

P. v. AVRIL. ENGBAVING MACHINE.

(Application filed. Sept. 3, 1901. (No Modal.) l0 sheets-Sheet l0.

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UNITED STATES PATENT OFFICE.

PAUL VICTOR AVRIL, OF PARIS, FRANCE, ASSIGNOR TO HIMSELF AND LA SOCIETEMARINIER, NAVOIT ET JEANSON, OF PARIS, FRANCE.

ENGRAVlNG-MACHINE.

SPECIFIGATION forming part of Letters Patent No. '71 1,273, datedOctober 14, 1902.

Application filed September 3, 1901. Serial No. 74,241. iNo model.)

To cut whom, it may concern.-

Be it known that I, PAUL VICTOR AVRIL, engineer, a citizen of the FrenchRepublic, residing at Paris, France, (post-office address Quai desGrands Augustins, in said city,) have invented certain new and usefulImprovementsin Engraving-Machines, of which the following is aspecification.

The object of this invention is to provide a machine in which carving,engraving, orchasing tools are operated automatically from a suitablemodel or pattern.

The invention will be understood from the following description, withreference to the' accompanying drawings, of which- Figure 1 is a frontelevation of a machine constructed according tothis invention. Fig. 2 isa side elevation thereof, some parts of the machine being removed. Figs.3 and 4 are elevations at right angles to each other of a clutch deviceforming part of the machine; Figs. 5 and 6 represent driving mechanismactuated through the medium of the clutch shown in Figs. 3 and 4, whichalso controls the operating mechanism represented in Figs. 7 and 8.Figs. 9 and 10 show a second clutch device also forming part of themachine. Fig. 11 is a side elevation of the tool-holding carriage orslide. Figs. 12 and 13 represent an electromagnetic coupling foroperating the tool. Figs. 14 and 15 are detail views of an electricalswitch. Fig. 16 illustrates a method ot'littingthestyleorpointadaptedtoslideover the pattern to be reproduced by the machine. Fig. 17 showsan electric cut-out. Fig. 18 is a partial side elevation of a modifiedform of machine enabling a cylindrical pattern to be employed. Fig. 19represents a modification of the tool-holding carriage. Fig. 20illustrates a modified method of fitting the tool. Fig. 2i shows by fulllines and dotted lines the tool in various positions.

In Fig. 1, a designates a lathe frame or bench on which are arrangedhead and tail stocks 7) and c and the tool-supporting carriage (7.Between the head and tail stocks 1) and c is secured the article 6, onwhich the tool supported by the carriage (Z is adapted to operate. Thespindle fof the headstock c is rotated by a wheel g and worm h, Fig. 2.

The tool-holding carriage is actuated by a' screw 11, rotated fromadriving-shaftj through the medium of suitable gearing and of anelectromagnetic operating device (shown at 7c) upon one end of the saidscrew. The pat tern or model m (which may be of plaster-ofparis, wax, orthe like) is secured to a platform 07,, arranged to slide on anotherplatform 0, which in its turn is capable of sliding transversely on twobenches p. The platform 71 receives motion through a screw (1, engagingwith a nut or tapped sleeve 4", secured to a platform 3, having atransverse groove u therein which engages with a pin t, fixed to theunder side of the said platform n. The platform 8 slides on a bench 1;,Fig. 2. The platform 0 is operated by means of a screwaz, Fig. 2,engaging a nut y. Upon the screw 2 which operates the carriage d, thereis mounted an electromagnetic clutch device. (Shown in Fig. 3.) Thisdevice consists of two electromagnets 1 and 2, between which adisk-shaped armature 3 is interposed. The frame of each electromagnetiscarried on a sleeve fast on the smooth end of the screw a, while thearmature or disk 3 is free to slide longitudinally upon the spindle 11',but is caused to rotate with the said spindle through the medium of apin or stud 4. The armature-disk is connected by rods 5 to a sleeve 6,mounted loosely upon the spindle t", the said rods passing through theframe of the elec-' tromagnet 2. To each end of the sleeve 6 is rigidlysecured a bevel-wheel 7 and 8, respectively. When the electromagnets 1or 2 are not energized, two helical springs 9 maintain the armature-disk3 out-of contact with the pole-pieces of the electromagnets. The momentone of the electromagnets is excited, however, it attracts thearmature-disk, which in shifting its position throws one of the wheels 7or 8 into gear with a bevel-wheel 10, Fig. 4. Fast on the spindle of thewheel 10 is a spur-wheel 11, which is in gear with a wheel 12, looselymounted on the spindle 7b of the worm 7b. The wheelll is in gear with awheel 13 and imparts thereby motion to a wheel 14, loosely mounted onthe smooth end m of the screw-shaft 0c. The wheels 12 and 14 carry arms15 and 16, respectively, on the bosses of which arms the wheels 12 and14 are shown in the drawings as being keyed, the said arms 15 and 16being thus free to rotate upon the spindles h and m, respectively. Thearm 15 actuates the worm it through the medium of an arrangementrepresented in detail inFigs. 5 and 6. Upon the spindle h there areloosely mounted two disks 17 and 18, each provided with a stop 19. Thetwo disks are connected together by means of a screw 20, passed throughboth disks. The disk 17 is provided with a single tapped opening for thepassage of the screw 20, while the disk 18 is provided with a series ofsmooth perforations 21, permitting the two stops 19 to be brought closertogether or moved farther apart, as required. The said disk 17,furthermore, carries a pawl 22, Which a spring 23 keeps in engagementwith a ratchet-wheel 24, keyed onto the spindle h. The ratchetwheel 24is provided with as many teeth as the disk 18 has perforations. The arm15 carries two tappets 25 and 26, which are independent of each otherand free to oscillate on a spindle 27, secured to the end of the saidarm 15. A spring 28 presses the tappets 25 and 26, respectively, againstthe disks l7 and 18. Two inclines 29 and 30, formed on a stationarysupport-31, are situated on either side of the disks 17 and 18. Theoperation of this arrangement is as fo lows: Assuming that the wheel 12and also consequently the arms 15 are revolving in the direction of thearrow 32, Fig. 6, the moment the tappet 25 comes into contact with thestop 19 of the disk 17 it begins to communicate its rotary motion to thedisks 17 and 18, and through thepawl and ratchet-wheel 22 24 the spindleh also is caused to participate in this rotary motion. This transmissionof motion ceases the moment the tappet 25 reaches the highest point ofthe incline 29, where it passes over the stop 19 of the disk 17. Thisstop 19 has by this time reached the point 19, while the stop of thedisk 17 18 has moved from the position 19 to the point 19". ture the arm15 becomes capable of revolving in the same direction indefinitelywithout the disks 17 18 or the spindle It being again set in motion,since the tappet 25 when it reaches the point 19 must pass over theincline 29 and over the stop 19 of the disk 17 without abutting at 19.The movement thus imparted to the spindle h corresponds to the arecomprised between the points 19 and 19'. This movement of the saidspindle h is transmitted through the medium of the worm h, Fig. 2, andwheel 9 to the cylindrical blank 6, Fig. 1, which is subjected only to aslight angular displacement. The stops 19 of the disks 17 and 18 arebrought back to their initial positions by the tappet 26 the moment. thedirection of rotation of the arm 15 is reversed, for when such reversemotion takes place the tappet 26 by striking the stop 19 of the disk 18at 19" imparts motion to both disks 17 and 18 until the tappet 26 is Atthis juncelevated by ascending the incline 30, where upon it releasesthe stop 19 of the disk 18. This stop therefore has thus been broughtfrom the position 19" to the position 19, while at the same time thestop 19 of the disk 17 has been moved back from 19 to 19, and whilethese movements are taking place the pawl 22 passes over the toothed rimof the ratchet-wheel 24 without engaging therewith, and consequentlywithout setting the spindle h in motion. While transmitting rotarymotion in alternate directions to the wheel 12, or, in other words, tothe arm 15, the worm h, Fig. 2, and consequently also the wheel 9 andblank 6, Fig. 1, receive movements equal in extent and in the samedirection. The amplitude of these successive movements may be accuratelyadjusted by means of the stops 19, Figs. 5 and 6, the distance betweenwhich should be determined beforehand according to the movements whichthe blank 6 is required to receive. The reversion of the direction ofrotation of the wheel 12 is effected,as hereinafter described, throughintermediate agency of electromagnetic clutch mechanism arranged uponthe screw-shaft t'. Thus by means of the arrangement described withreference to Figs. 5 and 6 the blank 6 receives a series of successivemovements to the same extent and in the same direction. The arm 16,Figs. 2 and 4, actuates the screw-shaft w, and consequently the platform91, carrying the pattern m, through the medium of thearrangementrepresented in Figs. 7 and 8. This arrangement, like thatshown in Figs. 5 and 6, comprises two disks 17 and 18, mounted looselyupon the smooth end 00 of the said screw-shaft a: and each provided witha stop 19. The two disks are connected together by means of ascrew 20.The arm 16 carries tappets 25 and 26, adapted to oscillate on thespindle or pivot 27, springs 20 pressing them against the disks 17 and18, respectively. On either side of the disks there are arrangedinclines 29 30, held up by the standard 33. On the disk 17 there isfitted, by'means of a bracket 34, an electromagnet 35, whereof thearmature 36 is rigidly mounted upon a spindle 37, adapted to turn freelywithin a fork or yoke 38, which is secured to the said bracket 34. Uponthe spindle 37 there are mounted two pawls 39 and 40, adapted to engagewith the ratchet-wheels 41 and 42, respectively, securely mounted uponthe spindle 00. The pawl 39 is fast upon the spindle 37, while the pawlparticipates in the rocking movements of such spindle, owing to theprovision of a stud or pin 43, engaging in a slot 44, which is formed inthe sleeve or hub of the pawl 40. Between this slot and the stud alittle play is allowed, which is neutralized bya spring 45, so that thepawl 40 may participate in the 0scillatory motion of the spindle37 andpermit the ratchet 42 to slip past in the direction of the arrow 46 withthe pawl 40 in gear.

In Fig. 8 the armature 36 is assumed to be attracted and the pawl 40 ingear. In this case the spindle 0; receives successive movements in thedirection of the arrow 46. The method of imparting motion to the spindle00 through the medium of the tappets 25 26 and stops 19 is identicalwith that adopted for the operation of the spindle h in the arrangementshown in Figs. 5 and 6. The dilference between the two arrangements,however, is that the device represented in Figs. 7 and 8 enables thespindle x, or, in other words, the screw m, to be turned in either oftwo directions, as required, whereas the mechanism illustrated in Figs.5 and 6 is specially contrived to cause the worm h invariably to revolvein the same direction.

The excitation of the electromagnet 35 is controlled by means of a cam49, Fig. 4, attached to the wheel g. This cam in conjunction with arubber 5O constitutes a cut-out placed in the same circuit with theelectromagnet 35. This circuit is closed upon the electromagnet so longas the rubber 5O presses upon aprojecting part of the cam 49. During therotation of the wheel g and conversely the circuit remains open duringall the time that a recessed part of the said cam 49 continues to facethe rubber 50. To the closing of the circuit corresponds the engagementof the pawl 40, while the pawl 39 engages while the circuit is broken,and the alternate engagement of the two pawls results in a reversion ofthe direction of rotation of the screw as and also consequently of thedirection of the transverse of the pattern m.

In Fig. 4 the cam 49 is shown insulated from the shaft f by a ring, asillustrated in cross-hatched lines. The electric circuit enters the cam,as shown at 180, and leaves the contact 50 through the wire 181. Thesupport of the contact 50 is also insulated from the frame of themachine.

Figs. 9 and 10 show an electromagnetic clutch which controls themotion-transmitting mechanism connecting the screw-shaftt' to thescrew-shaft (1. Upon the smooth end 1L, of the screw-shattt' there issecurely fastened a frame 51, supporting an electromagnet 52. Thearmature 53 of this electromagnet is fast upon a spindle 54, which isjournaled in a fork or yoke 55, forming part of the said frame 51. Uponthe spindle 54 are keyed two pawls 56 57, adapted to engage with thewheels 58 and 59, respectively, which are loose upon the spindle z" andare connected with the gear-wheels and 61, also loose upon the saidspindle 2". In Fig. 10 the armature 53 is represented as being attractedby the electromagnet and the pawl 56 as engaging with the wheel 58. Inthis case it is the wheel 60 which is set in motion as the spindle t"rotates. If the circuit to the electromagnet 52 be broken, the armature53 is pulled back by a spring 62 and causes the spindle 54 to oscillate,so as to release the pawl 56 from its engagement with the wheel 58 andthrow the pawl 57 into gear with the wheel 59. It is then the wheel 61which is set in motion during the rotation ofthe spindle t". The wheels60 and 61 are connected by a double train of gear-wheels 63 and 64,Figs. 1 and 2, to a shaft 65, carrying a bevelgearing 67, 68, 69, and70, communicating with the screw-shaft g. In some cases the double setof gear-wheels 63 and 64 may be dispensed with or the manner in whichthey are made up may be varied so as to enable one screw-shaft to berevolved in one direction and the other in an opposite direction and ata different rate of speed. The clutchgear shown in Figs. 9 and 10, owingto the alternate engagement of the pawls 56 and 57, respectively,permits the screw-shaft to receive rotary motion, either in onedirection or in the other, whence there will result a correspondingreversion of the direction and speed of the longitudinal motion of thepattern m or alternating periods of rest and motion of such pattern ifone only of the sets of gear-wheels be omitted. The alternate excitationof the electromagnet 52 is secured through the agency of a cut-outhereinafter described.

Fig. 11 is a side elevation of the tool-hold ing carriage. The tool 71is secured in a sleeve or socket 72, supported in a head-stock or frame73, which is attached to a platform 74, adapted to slide on the platform75 of the carriage. In order to move the tool into contact with thecylindrical. blank 6, the wheel 76 is operated. A connecting rod or link77 connects the platform 74 to a crank-shaft or crank-axle 78, mountedinaframe 79, secured to the platform 75 of the carriage. Upon the saidshaft 78 there is rigidly secured a sector 80, of insulating material,carrying two metal plates 81 82, between which alternately engages ametal point 83, projecting from a lever 84. This lever is connected witha bracket or frame 85, fitted with a point or style 86, which is appliedto the pattern 771. The whole arrangement formed by the lever 84 and theframe or bracket 85, supporting the style 86, is adapted to turn on thepivot 87. This pivot is mounted on an arm 88, resting upon the pattern mand pivoted at 89 to the frame 79. The frame or bracket 85 is madeadjustably removable, so that the. style 86 may be brought nearer to ormoved farther away from the pivot 87, as desired. Upon the shaft 78there are keyed two iron disks 90 91, Figs. 12 and 13, between which arefitted two electromagnets 92 93. The

poles of the electromagnet 92 extend beyond sequently the wheels 94 95,turn in opposite directions and are controlled by a transmission-gearing(shown in Fig. 12) consisting of two grooved pulleys 98 99, fast uponthe spindles carrying the worms, and, further, two

guiding-pulleys 100 and 101. These pulleys are operated by means of anendless cord 102, their spindles or shafts turning on centers in theframe 79, Fig. 11. The two electromagnets 92 and 98 are comprised withintwo separate circuits, communicating on the one hand with a source ofcurrent, such as 103, and on the other with the metal plates 81 and 82.These two circuits are shown diagrammatically in Fig. 13. l/Vhen thepoint 83, which communicates with the source of electricity 103, touchesthe plate 81, the circuit of the electromagnet 92 is closed, while whenthe point meets the plate 82 the circuit of the elec-v tromagnet 93 iscompleted. In the former case it is the wheel 94 which communicates itsrotary motion to the shaft 78 and to the sector through the medium ofthe mechanism constituted by the disks and 91 and the electromagnets 92and 93, while in the latter case it is the wheel which actuates both theshaft 78 and sector 80 through the same agency. The direction ofrotation of the wheels 94 95 should be so determined that in the firstcase the sector 80 may turn in the direction in which the plate 82 tendsto recede from the point 83, while in the second case the sector shouldturn in accordance with the tendency of the web-81 to move away from thesaid point 83. The plates 81 82 consequently never remain in contactwith the point 83, though the clear space or play between such point andWebs is very minute. The successive positions of the point 83 areobtained automatically through the medium of the point or style 86, Fig.11, which as it passes in turn over the depressed and raised portions ofthe pattern causes the arm 84 to oscillate upon its pivot 87, and asthis arm carries the insulatedpoint 83 this point im-' parts oscillatorymotion to the shaft 78, which motion is changed by the intermediateagency of the link 77, so as to-cause the tool 71 to move in thedirection of the arrow 104. Now it will be readily understood that asthe tool-carriage travels along the tool will cut more or less deeplyinto the blank e and will therefore produce therein a longitudinalgroove or score; The section and depth will exactly correspond to theline followed by the style 86 upon the pattern 072. In order to reversethe section, or, in other words, to obtain' a counterpart of thepattern, it would be sufficient to loosen the screw to, so as to renderthe sector 80 independent of the shaft 78, then' turn the crank onehundred and eighty degrees, and lastly to tighten the screw w again, .soas to restore the connection between the sector 80 and the shaft 78.

-Upon a pivotl06, Figs. 14 and 15, projecting from the front plate ofthe carriage (1, there is made fast a sector 107, of insulatingmaterial, fitted with two conducting-plates 108 109, which are pressedupon, respectively, by the brushes 110 111, insulated from the carriaged. The two plates 10S and 109 respectively communicate with twoterminals 112113, with which the sector-107 is also provided. Upon oneend of the pivot 106, which is suitably insulated from the carriage d,there is loosely mounted a lever 114, and upon its other end a lever isfixed. The lever 114 is constantly maintained bya spring 116 against oneof the terminals 112 113. The spring 116 is insulated from the lever114, upon which rests the rubber 117, insulated from the carriage. Thisarrangement, supported by the carriage, is supplemented by fiveconductors-viz., two wires running along the rod 118 and three plates119 120 121, mounted on the frame of the machine and suitably insulated.Each of the wires communicates, on the one hand, with one of theinsulated stops 122 123, secured on the rod 118, and, on the other hand,with one of the electromaguets 1 2 of the electromagnetic couplingmounted upon the screw-shaft 2, Figs. 1 and 3. Upon the three plates orwebs 119 120 121 there press three rubbers 124, 125, and 126,communicating with the brushes 110, 111, and 117, respectively. Theconducting web or bar 121 is connected to a source of current 127, whilethe two remaining webs 119 and 120 communicate with two electromagnets128 129 of an electromagnetic clutch, which owing to the alternateexcitation of the two electromagnets effects the required reversion ofthe direction of rotation of the worm-shaft 1). This clutch device willbe hereinafter more fully described.

The operating of the electric controlling mechanism described withreference to Figs. 14 and 15 is as follows: Assuming that the carriageis about to reach the end of its journey, having moved in the directionof the arrow 105, the lever 115 as it meets the stop 122 first closesthe circuit of the electromagnet 1 of the coupling mounted upon thescrew-spindle t. The current coming from the source of electricity 127(see the diagram Fig. 14) to the web 121 passes through the rubber 126,brush 117, lever 114, spindle 106, and lever 115 to the stop 122, whenceit enters the coil of the electromagnet 1 and returns to .the source127. The armature 3 being attracted by the electromagnet 1 throws thewheel 8 into gear with the wheel 10, Figs. 3 and 4, with the result thatthe worm h and screwoa are actuated, as has been stated with referenceto Figs. 5 to 8. As the carriage continues to move in the direction ofthe arrow 105 the lever 115, being arrested by the stop 122, shifts thelever 114, which presently is drawn back against the terminal 113 by thesudden actionof the spring 116. As the lever 114 has left the terminal112 and is now in contact with the I terminal 113, commutation has takenplace in the excitation of two electromagnets 128 129, as will bereadily understood upon inspection of the connection shown in Figs. 14and 15. The result is a reversing of the direction of rotation of thescrew-shaft 11, Fig. l, and consequently of the wheel 8, Fig. 3, whichis still in gear with the wheel 10, as previously described. Thecarriage cl will now be impelled in the direction opposite to thatindicated by the arrow 105. At the moment when the lever 115 leaves thestop 122 the circuit which comprises the electromagnet l is broken, andconsequently the wheel 8 becomes immediately disengaged from thewheel10. \Vhen thelever 115 comes into contact with the stop 123, it isthe electromagnet 2 which is excited, and the wheel 7 engages with thewheel 10, Fig. 4, in the direction opposite to that in which it hadpreviously turned the wheel 8. As the lever 115 is retained at rest bythe stop 123, while the carriage continues to travel in the oppositedirection, (indicated by the arrow 105,) the lever 114 will be drawnback by the spring 116 against the terminal 112, whereby there will becaused a fresh commutation in the excitation of the electromagnets 12Sand 129. Hence there will follow a change in the direction of rotationof the worm-shaft 11, Figs. 1 and 3, and the wheel 7. The carriage willonce more be set moving in the direction of the arrow 105, and the sameengagements and disengagements as before described will be repeated, andso on.

The operation of the electric controlling apparatus described withreference to Figs. 14 and 18 has the effect that whenever the carriagereaches the end of its stroke the reversion of the direction of motionof the screwt' and wheel 10 takes place automatically.

The electromagnetic coupling (shown at 70, Figs. 1 and 14) isconstructed as follows: The frames of the two electromagnets 128129 arerigidly secured upon a sleeve 130, Figs. 1 and 14, loose upon the end ofthe screwshaft L'. Upon the sleeve 130, facing the poles of the twoelectromagnets 128 129, there revolve freely two pulleys 131 and 132.These two pulleys turn in opposite directions to each other and are bothconnected to the driving-shaft j, one by a straight belt and the otherby a crossed belt. The one of the electromagnets 12S 12%) which happensto be excited attracts the pulley which is arranged in front of the saidpoles, and the sleeve 130 is set in motion in the direction in whichthat pulley rotates. The sleeve 130 communicates its rotary motion tothe screw 'i through the medium of a disk 133, keyed upon the sleeve 130and serving to imp-alt. motion to a plate or disk 134 by the aid ofstuds 135, with which the latter is fitted. The plate 134 is adapted toslide upon a spline forming part of the screvwshaft t, bu t causes suchscrew to participate in the rotary motion which is transmitted to theplate 134 by the disk 133. A spring 136 insures the engagement of theplate 134 with the disk 133. Facing the plate 134 there arranged anelectromagnet 137, the frame or stock of which is fast upon thescrew-shaft 2'. hen this such as m, Figs. 1 and 2upon a cylindricalblank, such as e, and that the carriage is traveling in the direction ofthe arrow and that the transmission-gearing which connects the screw 2'to the worm q is out of gear in other words, that the device shown inFigs. 9 and 10 has been removed from the screwspindle 1), so that thepattern may not move in thelongitndinaldirection of the machinethe toolwill cut a longitudinal groove in the cylindrical blank varying in depthaccording to the sectional profile of the undulatingline followed by thestyle 86 upon the pattern m. When the carriage arrives at the end of itscourse, the lever meets the stop 122, and

thereby closes the circuit of the electromagnetic clutch 1 2, mountedupon the wormshaft *6, and the lever 115 at the same time produces acommutation of the excitation of the electromagnets 128 129, Figs. 1 and14, whence there follows a reversion of the direction of motion of theworm-shaft i. The worm h and 00 being thus set in operation impart aslight angular movement to the blank e and a slight forward movement tothe patterm m. The screw t' next imparts to the carriage a movement fromright to left. During this second journey of the carriage the tool cutsanother groove-i. c., widens the original groove in the blank. When thelever 115 strikes the stop 123, the cylinder 6 receives a fresh angularmovement and the pattern on a corresponding forward movement. Then thescrew 'i again moves the carriage from left to right, and so on, untilthe complete pattern is reproduced by the tool upon the blank 6. There apattern is required to be reproduced on a blank more than once, thecarving extending all around the cylindrical blank, the cut-out4050comesintooperation. Thecam49 is provided on its periphery with anumber of projections and recesses equal to the desired number ofsuccessive reproductions of the pattern upon the cylinder 6. Thus thecam 49 (represented in Figs. 7 to 11) allows forfourreproductions of apattern upon and around the same cylindrical blank. Suppose a patternhas once been copied on such blank in the manner described and that itis desired to reproduce it four times in succession around thecylindrical surface so that the four reproductions join. During thefirst reproduction a ling the screw 00 has remained open.

the second reproduction a projection of the cam 49 passes under therubber 50. The circuit of the electromagnet therefore is closed, and thescrew :1: is set in motion by the pawl 40. From this moment at eachreverse motion of the carriage the pattern m recedes upon the screw 00,while the direction of the angular movements of the cylinder to becarried remains the same. The second reproduction is symmetrical withthe first, and inasmuch as the cut-out 49 50 after each reproductionbrings about a reversion of the direction of rotation of the screw as itis obvious that the succeeding reproductions are all symmetrical and incoincidence with each other, and if the number of reproductions is aneven number the last of them will fit in with the first.

It may happen that the style 86, Fig. 11, in sliding-over the patternshould get caught in one of the parts in relief where there is apractically vertical ridge or wall too high for the style to clear. Nowin order to obviate any defacement which would be apt to ensue in such acase and to permit the style 86 to rise to the requisite height the saidstyle is so arranged as to set the electromagnetic coupling 137 134,mounted upon the screw 1', Fig. 1, in operation the moment it meets anobstacle of the nature stated. To this end the style 86 is fitted in atapped socket or nut 139, Fig. 16, screwed into a sleeve 140, ofinsulating material. Into this sleeve is also screwed a rod I 141,integral with which is a washer 142, con- 12 and 13, the excitation ofwhich has the effect of setting in motion the sector 80, Fig. 11, in thedirection of the arrow 2, Figs. 11 and 19. With the nut 147 engagesloosely a metal cone 149, screwed onto the upper end of the rod 141,which is pressed upon by a plate 150, connected by Wire to the point orpin 83,Fig. 11. Assuming that the style 86 becomes caught, as stated, asthe carriage, and consequently the frame 85, Figs. 11 and 16, proceed ontheir course, the cone 149 will come into contact with the sleeve 147,while at 150 the contact will at the same time be interrupted. Hence thecircuit of electromagnet 137, Figs. 16 and 1, will be completed, whilethe circuit comprising the point 83, Fig. 11, will be broken.Consequently the screw t'will instantly come out of gear, since thearmature 134, Fig. 1, will no longer receive any motion from the disk133, and the carriage will stop, and inasmuch as the sleeve 147 alsocommunicates with one of the eleo tromagnets 92 93 the sector 80 will beset moving in the direction of the arrow z, Fig. 11, as described above.The point 83, which the plate 81 will cause to move in the direction .ofthe arrow .2, will cause the lever 84 to turn upon the pivot 87 untilthe style 86 gets clear of the obstacle, at which moment the rod 141,Fig. 16, will resume its vertical position and the contact between thecone 149 and nut 147 will be interrupted, while at 150 the contact willbe restored. It follows that the carriage will now resume its journey.

Suppose that it is desired to reproduce a small pattern several timesover on the same cylinder, but in the direction of the length of suchcylinder. In that case the mechanism shown in Figs. 9 and 10 must bemounted upon the end 2" of the shaft 2', Fig. 1, and one of the twotrains of gear-wheels 63 and 64 must be omitted, while the arm 88, Fig.11, should support at 151 the cut-out, as shown in Fig. 17. This cut-outconsists of a lever 152, of insulating material, pivoted at 153 on apivot projecting from the arm 88. The lever 152 is coupled with a rod154, which is guided in its movements by the arm 88. On either side ofthe lever 152 there are secured upon the arm 88 brackets 155, formed onthe said arm 88, a stop" 156, and a terminal 157, respectively. With thelatter there is arranged'to come in contact a contact-piece 158, i

with which the lever 152 is provided. A spring 159 maintains the lever152 in contact either with the stop 156 or with the terminal 157. Thecontact-piece 158 communicates with a source of current 160, while theterminal 157 is connected to the coil of the electromagnet 52, Figs. 9and 10, which, on the other hand,

communicates with the source of current 160.

The pattern we is on either side provided with stops 161, facing theends of the rod 154. The machine being thus complete is capable ofreproducing a small pattern several times in succession in the directionof the length of the cylindrical blank 6.

Supposing the pattern is stationary, dur-' ing the traversing motion ofthe carriage the tool marks upon the blank a score or groovecorresponding in depth to the profile of the undulating line followed bythe style 86 upon the pattern. The moment the rod 154, Fig. 17, meetsthe bar 161 on the right the lever 152 is shifted and the contact 158comes into touch with the terminal 157. The electromagnet 52, Figs. 9and 10, therefore is excited, so that the screw q, Fig. 1, is set inrotary motion, as has already been explained, and the pattern receivesaxial motion. The operation of the gearing which connects the screws 2'and q should be so timed that the speed of motion of the pattern isequal to twice the speed of progress of the carriage. The tool will nowprolong the groove it has commenced, making a score the section of whichit had cut while the pattern was at rest, so that the scores or grooveswill join. Then the moment the bar 161, situated on arm 88.

theleft-hand side of the pattern, abuts against as it is or is notattracted, touches one or the the rod 154, which will swing over thelever 152, this lever will once more be drawn back against the stop 156by the spring 159. As new the circuit of the electromagnet is broken thepattern ceases to move. If the carriage continues to travel in the samedirection, the tool will continue to cut the same groove, and so on.When the carriage has reached the end of its journey, the screwt'reverses its direction of rotation, while the blank 6 receives a slightangular movement and the pattern a slight transverse movement. Now thecarriage commences its return journeyin the opposite direction. Duringthis return of the carriage the tool enlarges the original groove, thecu trout shown in Fig. 17 operating in the manner described above.

In order to reproduce the profile of the pattern on an enlarged or areduced scale, it is only necessary to determine accordingly therelation of the respective speeds of the carriage and pattern and alsothe direction of the motion of the latter. Hence it follows, too, thatthe copy of a pattern maybe deformed or distorted in any desired mannerin the direction of the length of the cylindrical blank. It will bereadily understood that the several modes of reproduction hereinconsidered may be variously combined according as a given pattern is tobe enlarged, reduced, or deformed in any way.

here it is desired to copy a cylindrical pattern, it suffices to securesuch pattern between the head-stocks mounted upon the bench n, Figs. 1,2, and 18. Upon the spindle 162, Fig. 18, of the head-stock 163 thereshould be made fast a worm-wheel 164, gearing with the screw 00. Theplatform 0, Fig. 2, has first been removed. The arm 68 rests upon thepattern m Inasmuch as the modification made in the machine for thispurpose is extremely sim ple, the operation of this form of machine neednot be specially described.

Instead of working from a pattern with a raised and depressed design asmooth metal pattern may be used, to the surface of which the design tobe carried on the cylinder 6 may be applied in the shape of a layerofinsulating material, such asa suitable varnish. Thus in Fig. 19 there isrepresented a patternm, of metal, which carries on its surfaces thedesign to be copied, modeled in insulating material, the outlines ofsuch design being indicated by the heavy dashes 165. In the case of sucha pattern the alternating excitation of the electromagnets. 92 93, Figs.12 and 13, is secured by means of the following arrangement: The metalstyle 86 Fig. 19, is insulated from its holder 166, supported by the Itis electrically connected to a terminal 167, which in its turn isconnected to the coil of the electromagnet 168, comm unicating with thesource of current 103. The armature 169 of the electromagnet, accordingotherof the terminals 170 and 171, which communicate with the rubbers172 and 173, respectively. These two rubbers press upon two metal plates174 175, mounted upon the sector 80. The said plates, which are similarto the plates 81 82, (shown in Figs. 11 and 13,) communicate with theelectromagnets 92 93. The armature 169 communicates with the source ofelectricity 103. All these electrical connections are indicated bydiagram. When the style 86 rests upon a metallic portion of the patternm, as it is supposed to do in Fi 19, the circuit of the electromagnet168 is closed and the-armature 169 touches the terminal 171. In thiscase the circuitclosed cornprises that one of the electromagnets 92 93,12 and 13, which communicates with the plate 175. When, on the otherhand, the style 66 comes to bear upon a portion of the pattern coveredwith insulating, material, the circuit of electromagnet 168 is brokenand the armature 169 is pulled back by aspringagainst the terminal 170.In this case the circuit closed com prises that one of theelectromagnets 92 93 which communicates with the plate 174, and asduring the progress of the carriage the style 86 presses alternatelyupon metal and upon insulating material it follows that the requiredalternation of excitation of the two electromagnets 92 93 takes place,with the result that the tool reciprocates, as described with referenceto Figs. 11 and 13. Inasmuch as the course of the tool as it moves inthe direction of the arrows 104:, Fig. 11, is invariably the same, it isso regulated that in one position it closely approaches, but does nottouch, the surface of the cylinder 6, while in the other position italways cuts to the same depth. It will be understood that the severalparts of this machine may be used in enlarging, reducing, distorting, orrepeating the design in the manner hereinbefore described.

Fig. 20 illustrates a modified method of fitting the tool 71. In thisarrangement the link 77 imparts to the tool not rectilinear but circularmovementsthat is to say, inclines the tool at various angles. To thisend the tool 71 is mounted upon a runner 176, adapted to slide on acircular table 177. This table is integral with a platform 178, whichmaybe set in motion upon the platform of the carriage by operating thewheel 179. The link 77 is connected with the runner 176. In Fig. 21there are shown by Way of illustration several of the positions which acutter may take in working upon the ribs of a grooved cylinder eintended for use in rippling, ribbing, mohairing, Watering textiles,fabrics, paper, leather, or the like. It is the link '77 which byimparting motion to the runner 176 causes the cutter to take up thedifferent positions. The operation of the various devices alreadydescribed is the same as where the tool is arranged to receiverectilinear motion, Fig. 11.

Throughout the foregoing description we have assumed that the tool worksupon a cylindrical blank; butit will be readily understood that it isonly necessary to connect the spindle of the head-stock c to a plateguided by a vertical supporting frame or standard by means of suitabletransmission-gearing in order to adapt the tool for working upon suchplate in the same manner as it did upon the cylinder 6. I

Having now particularly described and ascertained the nature of myinvention and in what manner the same may be performed, I declare thatwhat I claim is 1. In an engraving-machine, a travelingcarriage,meansforimpartingasuitable movement thereto, a tool, means forsupporting the said tool upon the carriage, a shaft, connections betweensaid supporting means and said shaft for reciprocating the former whensaid shaft is operated, a style adapted to travel over the face of apattern, an electromagnetic device mounted upon said shaft and whenenergized putting it into operation, a lever connected with and operatedby the style, and means engaged by the lever for closing an electricalcircuit to energize said magnetic device.

2. In an engravingmachine, a traveling carriage, operating meanstherefor, a tool-support mounted upon the carriage, a shaft, connectionsbetween the shaft and tool-support for reciprocating the latter when theshaft is operated, a styha-an electromagnetic device mounted upon saidshaft and when energized putting it into operation, a sector carried bysaid shaft, a contact device carried by the sector, and a leverconnected with and operated by the style to engage said contact devicefor closing an electric circuit and energizing the said magnetic device.

3. In an engraving-machine, a traveling carriage, a screw for operatingthe same, means for operating said screw, an electromagnetic devicemounted on one end of said screw for reversing the operation thereof, anelectromagnetic device mounted upon the other end of said screw, meansfor supporting the work to be operated on, connections between thelast-named electromagnetic device and said supporting means for thework, said connections operating to displace the work when the saidlast-named electromagnetic device is operated, a pattern, means forsupporting the pattern, operating means for said supporting means forthe pattern, a style adapted to travel over the face of the pattern, atool-support upon the carriage, an electromagnetic device mounted uponsaid carriage, mechanism for imparting a reciprocatory movement to saidtool-support adapted to be connected with said last-named device, and ameans connected with the style and engaging with the said mechanism forclosing an electric circuit and energizing the magnetic device upon thecarriage.

4. In an engraving-machine, a supportingplatform for the pattern, meansfor moving said pattern, a traveling carriage, means for impartingmovement thereto, a tool-support carried by the carriage, a shaftsupported by the carriage, connections between the shaft and thetool-support, an electromagnetic device mounted upon the shaft, acircuit making and breaking mechanism carried by the shaft and adaptedto energize and deenergize said magnetic device, a style adapted toengage the pattern carried by the platform, and means connected with thestyle and adapted to engage said mechanism for making and breaking anelectrical circuit.

5. In an engraving-machine, a traveling carriage, means for impartingmovement thereto, a supporting-platform for a pattern, means for movingsaid platform, a tool-support mounted upon the carriage, a shaftsupported by the carriage, connections between said shaft and saidtool-support for reciproeating the latter, an electromagnetic devicemounted upon the shaft and adapted when energized to operate said shaft,a style adapted to engage the surface of the pattern carried by theplatform, and a circuit making and breaking mechanism suitably connectedwith and operated by said style for making and breaking an electricalcircuit during the passage of the style over the pattern.

6. In an engraving-machine, means for supporting the work to be operatedupon, a traveling carriage, a screw for imparting movement to saidcarriage, an electromagnetic device mounted on one end of said screw forreversing the movement thereof, an electrical mechanism connected withthe other end of said screw and with said means for supporting the workand adapted when operated to impart a suitable displacement to saidwork, a tool-support mounted upon the carriage, an electrically-operatedmechanism carried by the carriage and connected with said toolsupportfor reciprocating it when said mechanism is operated, asupporting-platform for a pattern, means for moving said platform, astyle traveling over the surface of the pattern upon the platform, and alever connected with the style and adapted to engage with said mechanismcarried by the carriage for making and breaking an electrical circuit.

7. In an engraving-machine,means forsupporting the work to be operatedupon, a traveling-carriage, operating means therefor, connectionsbetween said operating means and supporting means for the work forimparting a suitable displacement to the work, a supporting-platform fora pattern, means for moving said platform, a tool-support carried by thecarriage,an electrically-operated mechanism connected with and adaptedto reciprocate said tool-support, and means traveling over the surfaceof the pattern and adapted to engage with said mechanism for making andbreaking an electrical circuit, causing thereby the operation anddiscontinuing 1 ing carriage, means for imparting movement of theoperation of the said mechanism.

8. In an engraving-machine, a supportingplatform for a pattern, meansfor moving said platform, a traveling carriage, means for impartingmovement thereto, a tool, reciprocatory means mounted upon said carriagefor sup-porting the tool, a style traveling over the surface of thepattern, a shaft connected with the tool-supporting means forreciprocating it, an electromagnetic device mounted upon said shaft andwhen energized puttingit into operation, a lever pivotally connectedwith the style and operated thereby, mechanism mounted upon the saidshaft and engaged by the said lever for making and breaking anelectrical circuit to energize and deenergize said magnetic device tocause the reciprocation of said supporting means and the operation ofsaid shaft, electrical mechanism for alternately reversing the directionof travel of said carriage, and means for reversing the movement of saidplatform.

9. In an engraving-machine, means for supporting the work operatedupon,means for imparting a suitable displacement to said work, atraveling carriage, suitable operating means for said carriage, a tool,a reciprocatory supporting means for the tool mounted upon the carriage,a shaft mechanism connected with said shaft and said supporting meansfor op erating the latter, a supporting-platform for t a pattern,suitable operating means for said platform, a style traveling over thesurface of the pattern, an electromagnetic device carried by said shaftand when energized, putting it into operation, and a circuit making andbreaking mechanism connected with the style, operated thereby andadapted when operated to energize and denergize said device causingthereby the operation of said reciprocating means for the tool. I

10. In an engravingmachine, means for supporting the work operated upon,means for imparting a suitable displacement of said work, a travelingcarriage, suitable operating means for said carriage, a tool, areciprocating supporting means for the tool mounted upon the carriage, ashaft, mechanism connected with said shaft and said supporting means foroperating the latter, a supportingplatform for a pattern, suitableoperating means for said platform, a style traveling over the surface ofthe pattern, an electromagnetic device mounted upon said shaft and whenenergized putting it into operation, a circuit making and breakingmechanism connected with the style, operated thereby and adapted whenoperated to energize and deenergize said device causing thereby theoperation of said shaft, and means for automatically reversing thedirection of travel of the carriage.

11. In an engraving-machine, means for supporting the work operatedupon, an electrically-operated mechanism for imparting a to saidcarriage, a tool operating upon the work, a reciprocatory tool-supportmounted upon the carriage, a shaft upon the carriage, connectionsbetween the shaft and the said support for reciprocating the latter whenthe shaft is operated, a supporting-platform for the pattern, operatingmeans for said plat-- form, circuit-closing means carried by said shaft,an electromagnetic device carried by said shaft and when energizedputting it into operation, a lever adapted to engage saidcircuit-closing means to make and break an electrical circuit causingthereby the energizing and deenergizing of said magnetic device carriedby the shaft, and a. style traveling over the surface of said patternand connected with said lever for operating it. i

12. In an engraving-machine, means for supporting the work to beoperated on, a traveling carriage, a tool, supporting means for the saidtool mounted upon the carriage, a shaft suitably connected With saidsupporting means and adapted when operated to reciprocate the saidsupporting means, a sector carried by said shaft, contact-plates carriedby the said sector, a pair of electromagnets mounted upon the shaft andconnected to operate the said shaft, a style adapted to travel over thesurface of the pattern, and means connected to and operated by the styleand adapted to engage said contact-plates to make and break anelectrical circuit causing thereby the energizing and deenergizing ofsaid magnets and the operation of said shaft.

13. In an engravingmachine, means for supporting the work to be operatedon, a traveling carriage, a tool, supporting means for the said toolmounted upon the carriage, a shaft suitably connected with saidsupporting means and adapt-ed when operated to reciprocate the saidsupporting means, a sector carried by said shaft, contact-plates carriedby the said sector, a pair of electromagnets mounted upon the shaft andconnected to operate the said shaft, a style adapted to travel overthesurface of the pattern, and a lever connected with and operated by thestyle and adaptedto engage said contact-plates to make and break anelectrical circuit causing thereby the energizing and deenergizing ofsaid magnets and the operation of said shaft.

14. In an engraving-machine, means for supporting the object to beoperated upon, means for imparting a suitable displacement to saidobject, a traveling carriage, a tool, supporting means for the toolmounted upon the carriage, mechanism connected with the said supportingmeans forreciprocating it, a pair of electromagnets mounted upon thecarriage and when" energized putting said mechanism into operation, anelectrical circuit making and breaking mechanism for energizing anddenergizing the said magnets, a supporting-platform for a pattern, meansfor imparting a suitable movement to said platsuitable displacement tosaid work, a travelform, a style traveling over the surface of thepattern, means connected with the style and adapted to be operatedthereby and when operated engaging with the said circuit making andbreaking mechanism to cause the energizing and denergizing of saidmagnets, means adapted to operate the said carriage, an electromagneticclutch connected with said operating means for the carriage to reversethe movement thereof, means carried by the carriage and adapted toengage the said clutch for operating the same, and an electrical meansfor automatically reversing the direction of movement of the saidplatform.

15. In an engraving-machine, means for supporting the object to beoperated upon, means for imparting a suitabledisplacement to saidobject, a traveling carriage, a tool, supporting means for the toolmounted upon the carriage, mechanism connected with the said supporting,means for reciprocating it, a pair of electromagnets mounted upon theearriage and putting when energized said mechanism into operation, anelectrical circuit making and breaking mechanism for energizing anddenergizing the said magnets, a

supporting-platform for a pattern, means for imparting a suitablemovement to said platform, a style adapted to travel over the surface ofthe pattern, means connected with the style and adapted to be operatedthereby to engage the said circuit making and breaking mechanism tocause the energizing and deenergizing of said magnets, means adapted tooperate the said carriage, an electromagnetic clutch connected with saidoperating means for the carriage to reverse the movement thereof, andmeans carried by the carriage and adapted to engage the said clutch foroperating the same.

16. In an engraving-machine, a traveling carriage, operating meanstherefor, an electricallywoperated clutch connected to and adapted toreverse the movement of said operating means, means carried by thecarriage adapted to cause the operation of said clutch, a tool,supporting means for the tool mounted upon the carriage, a travelingplatform carrying a pattern, operating means for said platform,mechanism connected with said supporting means for reciprocating it,electrical means mounted upon the carriage and when energized adapted toput said mechanism into operation, a style adapted to travel over thesurface of said pattern, means connected with the style and adapted tobe operated thereby to make and break an electrical circuit causingthereby the operation of the electrical means, and means for reversingthe direction of travel of said platform.

17. In an engraving-machine, a carriage, a reciprocating tool-supportmounted thereon, operating means for the carriage, a platform adapted tocarry a pattern, a style adapted to travel over the surface of theplatform, a frame connected with the carriage, suspending meansconnected with the frame for the style, mechanism supported by thecarriage for connecting the style with the tooli PAUL VICTOR AVRIL.

\Vitnesses: EDWARD P. MAOLEAN,

EMILE KLOTZ.

